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Family Tree App Help

I have built a family tree program which thus far allows you to add relationships to nodes (mother, father, partner & siblings). This allows the tree to be built. well at least the links to be made.

My problem is I have to represent the tree textually. This is proving to be very hard. I thought of allowing to display the ancestors and descendants for a particular node but this proves to be difficult, especially when there are more than two generations for displaying ancestors (great grandparents and above).

To make things more clear I thought of using a file tree structure but got into a mess when displaying for great grandparents.